18036923 has 2 divisors, whose sum is σ = 18036924. Its totient is φ = 18036922.

The previous prime is 18036877. The next prime is 18036929. The reversal of 18036923 is 32963081.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18036923 is a prime.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 18036923.

It is not a weakly prime, because it can be changed into another prime (18036929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9018461 + 9018462.

It is an arithmetic number, because the mean of its divisors is an integer number (9018462).

Almost surely, 2^18036923 is an apocalyptic number.

18036923 is a deficient number, since it is larger than the sum of its proper divisors (1).

18036923 is an equidigital number, since it uses as much as digits as its factorization.

18036923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 18036923 is about 4246.9898751940. The cubic root of 18036923 is about 262.2532126531.

The spelling of 18036923 in words is "eighteen million, thirty-six thousand, nine hundred twenty-three".